260 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
H. I. Feldspars separated from olivine diabase; NE. } sec. 13, T. 45 N., R.1 W., 
Wisconsin. See Van Hise, Mon. XIX. Analyses by T. M. Chatard. 
J. Feldspar from gabbro; southern half of sec. 14, T. 44 N., R. 4 W., Wisconsin. 
See Van Hise, loc. cit. Analysis by T. M. Chatard. 
The following feldspars were separated from Minnesota gabbros for W. 8. Bayley 
and analyzed by W. F. Hillebrand: 
K. From average gabbro, south quarter post, sec. 35, T. 61 N., R. 12 W. 
L. From gabbro, NW. } SE. } sec. 23, T. 62 N., R. 10. 
M. From gabbro, center of sec. 25, T. 64 N., R. 8. 
N. From gabbro, Duluth and Iron Range Railroad. 
O, P. Two feldspars separated from the amphibolite of Palmer Center, Massachu- 
setts. Analyses by W. F. Hillebrand. Specific gravity of O, 2.667 at 24°; of P, 
2.677 at 22°. In O calculation gives about 7.4 and in P 7.6 per cent of admixed 
quartz. 
15| 123 HG ticcecMacucsa 
eaceces TTACE: |e Sovtien ont outcay sell aa demcen 
12°83°] 12.95 | 11233"| "5083" "7/85 
0) 2901 AU Iiacesces bcwece on 
3:72) 3.80} 4.33 | °7278"| "6:36 
53} .53| 68 16 
25} 129k 93 42 4g 
trace | trace | trace! trace trace 
100. 69 | 100.28 } 100.38 | 100.51 | 100.62 
LEUCITE. 
From Mount Vesuvius. A fine crystal. Analysis by George Steiger. 
NiOdi a verseees acetals peteno teehee anata rodald Hedde eased delwaneseaie seit Oodaaayh acted 55. 40 
Me Oseinznsntacercuectnsch thes dete caceasemeaewer eet Gaal sbeetatmnteas wScde seed ene eS eeees 23. 69 
CaO a's scconsnmenen are ueemanemene es te AeA EN eat ceRme Eee teemwasdane seae te menecers -16 
EGO sc: scsticicciccinms nd os seeiciomciat man aun tietatie ss ade aie neon He eee nasi sale ciomaiancte 19. 54 
NOG) oe ncercuutelsjive ¢camch tistelniouios sie sisi Rmredisicic st amnisindrales cisialoninewieetna ote ate commie hd 1.25 
HO sk siewausiaics racemes pgseemnnieiciet a cana onveasiieay sees e aE See MEa Ede sihE 24 
100. 28 
ENSTATITE. 
A. Enstatite from Granville, Massachusetts. Slightly altered. Described by 
Emerson in Mon. XXIX. Analysis by W. F. Hillebrand. i 
B. Enstatite separated from the San Emigdio meteorite, found in San Bernardino 
County, California. Analysis by J. E. Whitfield. 
C. White, fibrous mineral, near enstatite, from seams in chrysolite rock, Corundum 
Hill, North Carolina. 
D. Altered enstatite, Corundum Hill. Analyses C and D by T. M. Chatard. (See 
Bull. 42.) Sp. gr., 2.872. 
E. Bronzite separated from the websterite of Hebbville, Maryland. Described by 
Williams in Am. Geologist, vol. 6, p. 35. Analysis by T. M. Chatard. 
